The Most Promising Startups

For our annual survey of the most promising technology entrepreneurs, Bloomberg Businessweek's editors and writers weighed input from venture capitalists, angel investors, and other representatives of startups. We also relied on an ongoing direct dialogue with readers and startup founders and on the expertise of our editorial staff. Each slide lists the company name, executives aged 30 and under, a business description, and the wisest funding decision that executives feel they have made.